There are no commands defined in the “migrate” namespace

Question

Migration issue from M1.9 to M2.3.1

After importing settings successfully when I run data migration command it gave me following error:

There are no commands defined in the "migrate" namespace.

Answer 1

Actually After migrate settings, I had imported one wrong custom module's setting into M2 core_config_data table. Due to which non of the cli commands workable: i run just php bin/magento I had following error at the end.

Notice: Undefined index: jobs in /usr/local/ampps/www/mage231/vendor/magento/module-cron/Model/Config/Converter/Db.php on line 39

So I fix this issue (In your case issue can be different but direction is same) and after that run migration command.

Answer 2

There must have some problems during the process. You need to re-install the migration tool following this dev document: https://devdocs.magento.com/guides/v2.3/migration/migration-tool-install.html.

And run it again!